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  <ul class="link-list" role="directory">
    <li><a href="#label-NEWS+for+Ruby+1.9.2">NEWS for Ruby 1.9.2</a>
    <li><a href="#label-Changes+since+the+1.9.1+release">Changes since the 1.9.1 release</a>
    <li><a href="#label-Library+updates+-28outstanding+ones+only-29">Library updates (outstanding ones only)</a>
    <li><a href="#label-Language+changes">Language changes</a>
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<main role="main" aria-label="Page NEWS/NEWS-1.9.2">

<h1 id="label-NEWS+for+Ruby+1.9.2"><a href="../ruby_3_3_0_preview2/NEWS_md.html">NEWS</a> for Ruby 1.9.2<span><a href="#label-NEWS+for+Ruby+1.9.2">&para;</a> <a href="#top">&uarr;</a></span></h1>

<p>This document is a list of user visible feature changes made between releases except for bug fixes.</p>

<p>Note that each entry is kept so brief that no reason behind or reference information is supplied with.  For a full list of changes with all sufficient information, see the ChangeLog file.</p>

<h2 id="label-Changes+since+the+1.9.1+release">Changes since the 1.9.1 release<span><a href="#label-Changes+since+the+1.9.1+release">&para;</a> <a href="#top">&uarr;</a></span></h2>

<h3 id="label-Library+updates+-28outstanding+ones+only-29">Library updates (outstanding ones only)<span><a href="#label-Library+updates+-28outstanding+ones+only-29">&para;</a> <a href="#top">&uarr;</a></span></h3>
<ul><li>
<p>builtin classes</p>
<ul><li>
<p><a href="../Array.html"><code>Array</code></a></p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p><a href="../Array.html#method-i-keep_if"><code>Array#keep_if</code></a></p>
</li><li>
<p><a href="../Array.html#method-i-repeated_combination"><code>Array#repeated_combination</code></a></p>
</li><li>
<p><a href="../Array.html#method-i-repeated_permutation"><code>Array#repeated_permutation</code></a></p>
</li><li>
<p><a href="../Array.html#method-i-rotate"><code>Array#rotate</code></a></p>
</li><li>
<p><a href="../Array.html#method-i-rotate-21"><code>Array#rotate!</code></a></p>
</li><li>
<p><a href="../Array.html#method-i-select-21"><code>Array#select!</code></a></p>
</li><li>
<p><a href="../Array.html#method-i-sort_by-21"><code>Array#sort_by!</code></a></p>
</li></ul>
</li><li>
<p>extended method:</p>
<ul><li>
<p>Array#{uniq,uniq!,product} can take a block.</p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../Complex.html"><code>Complex</code></a></p>
<ul><li>
<p>new method:</p>
<ul><li>
<p><a href="../Complex.html#method-i-rationalize"><code>Complex#rationalize</code></a></p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../Dir.html"><code>Dir</code></a></p>
<ul><li>
<p>new method:</p>
<ul><li>
<p><a href="../Dir.html#method-c-home"><code>Dir.home</code></a></p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../Encoding.html"><code>Encoding</code></a></p>
<ul><li>
<p>new encodings:</p>
<ul><li>
<p>Big5</p>
</li><li>
<p>Big5-UAO</p>
</li><li>
<p>ISO-2022-JP-KDDI</p>
</li><li>
<p>SJIS-DoCoMo</p>
</li><li>
<p>SJIS-KDDI</p>
</li><li>
<p>SJIS-SoftBank</p>
</li><li>
<p>UTF8-DoCoMo</p>
</li><li>
<p>UTF8-KDDI</p>
</li><li>
<p>UTF8-SoftBank</p>
</li></ul>
</li><li>
<p>new method:</p>
<ul><li>
<p>ascii_compatible?</p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../Enumerable.html"><code>Enumerable</code></a></p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p><a href="../Enumerable.html#method-i-chunk"><code>Enumerable#chunk</code></a></p>
</li><li>
<p><a href="../Enumerable.html#method-i-collect_concat"><code>Enumerable#collect_concat</code></a></p>
</li><li>
<p><a href="../Enumerable.html#method-i-each_entry"><code>Enumerable#each_entry</code></a></p>
</li><li>
<p><a href="../Enumerable.html#method-i-flat_map"><code>Enumerable#flat_map</code></a></p>
</li><li>
<p><a href="../Enumerable.html#method-i-slice_before"><code>Enumerable#slice_before</code></a></p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../Enumerator.html"><code>Enumerator</code></a></p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p><a href="../Enumerator.html#method-i-peek"><code>Enumerator#peek</code></a></p>
</li><li>
<p><a href="../Enumerator.html#method-i-next_values"><code>Enumerator#next_values</code></a></p>
</li><li>
<p><a href="../Enumerator.html#method-i-peek_values"><code>Enumerator#peek_values</code></a></p>
</li><li>
<p><a href="../Enumerator.html#method-i-feed"><code>Enumerator#feed</code></a></p>
</li><li>
<p><a href="../StopIteration.html#method-i-result"><code>StopIteration#result</code></a></p>
</li></ul>
</li><li>
<p>extended method:</p>
<ul><li>
<p>with_index accepts an optional argument that specifies the index number to start with, defaulted to 0.</p>
</li></ul>
</li><li>
<p>incompatible changes:</p>
<ul><li>
<p>rewind now calls the “rewind” method of the enclosed object if defined.</p>
</li><li>
<p>next doesn’t clear the position at end.</p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../ENV.html"><code>ENV</code></a></p>
<ul><li>
<p>Uses locale’s encoding</p>
</li><li>
<p><a href="../ENV.html#method-c-5B-5D-3D"><code>ENV.[]=</code></a> raises Errno::{EINVAL,ENOMEM} etc. on failure.</p>
</li><li>
<p>new methods:</p>
<ul><li>
<p><a href="../ENV.html#method-c-keep_if"><code>ENV.keep_if</code></a></p>
</li><li>
<p><a href="../ENV.html#method-c-select-21"><code>ENV.select!</code></a></p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../Float.html"><code>Float</code></a></p>
<ul><li>
<p>new constants:</p>
<ul><li>
<p>Float::INFINITY</p>
</li><li>
<p>Float::NAN</p>
</li></ul>
</li><li>
<p>new method:</p>
<ul><li>
<p><a href="../Float.html#method-i-rationalize"><code>Float#rationalize</code></a></p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../File.html"><code>File</code></a></p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p><a href="../File.html#method-c-realpath"><code>File.realpath</code></a></p>
</li><li>
<p><a href="../File.html#method-c-realdirpath"><code>File.realdirpath</code></a></p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../GC/Profiler.html"><code>GC::Profiler</code></a></p>
<ul><li>
<p>new method:</p>
<ul><li>
<p><a href="../GC/Profiler.html#method-c-total_time"><code>GC::Profiler.total_time</code></a></p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../Hash.html"><code>Hash</code></a></p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p><a href="../Hash.html#method-i-keep_if"><code>Hash#keep_if</code></a></p>
</li><li>
<p><a href="../Hash.html#method-i-select-21"><code>Hash#select!</code></a></p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../IO.html"><code>IO</code></a></p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p><a href="../IO.html#method-i-autoclose-3D"><code>IO#autoclose=</code></a></p>
</li><li>
<p><a href="../IO.html#method-i-autoclose-3F"><code>IO#autoclose?</code></a></p>
</li><li>
<p><a href="../IO.html#method-i-fdatasync"><code>IO#fdatasync</code></a></p>
</li><li>
<p>IO#codepoints</p>
</li><li>
<p><a href="../IO.html#method-i-each_codepoint"><code>IO#each_codepoint</code></a></p>
</li></ul>
</li><li>
<p>extended method:</p>
<ul><li>
<p><a href="../IO.html#method-c-pipe"><code>IO.pipe</code></a> can take a block.</p>
</li></ul>
</li><li>
<p>new modules:</p>
<ul><li>
<p><a href="../IO/WaitReadable.html"><code>IO::WaitReadable</code></a></p>
</li><li>
<p><a href="../IO/WaitWritable.html"><code>IO::WaitWritable</code></a> They are used to extend non-blocking exceptions.</p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../Integer.html"><code>Integer</code></a></p>
<ul><li>
<p>new method:</p>
<ul><li>
<p><a href="../Integer.html#method-i-rationalize"><code>Integer#rationalize</code></a></p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../Kernel.html"><code>Kernel</code></a></p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p>Kernel#respond_to_missing?</p>
</li><li>
<p>Kernel#singleton_class</p>
</li><li>
<p><a href="../Kernel.html#method-i-require_relative"><code>Kernel#require_relative</code></a></p>
</li></ul>
</li><li>
<p>extended method:</p>
<ul><li>
<p>Kernel#respond_to? can be used to detect methods not implemented. For example, Process.respond_to?(:fork) returns false on Windows.</p>
</li></ul>
</li><li>
<p>incompatible changes:</p>
<ul><li>
<p>Kernel#instance_eval yields the receiver.</p>
</li><li>
<p><a href="../Kernel.html#method-i-exec"><code>Kernel#exec</code></a></p>
</li><li>
<p><a href="../Kernel.html#method-i-spawn"><code>Kernel#spawn</code></a></p>
</li><li>
<p><a href="../Kernel.html#method-i-system"><code>Kernel#system</code></a></p>
</li><li>
<p>Kernel#‘ (`…`) ..etc.</p>

<p>On Windows, the current directory is no longer implicitly prepended to the default command search path, just like other platforms.</p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../MatchData.html"><code>MatchData</code></a></p>
<ul><li>
<p>new method:</p>
<ul><li>
<p><a href="../MatchData.html#method-i-3D-3D"><code>MatchData#==</code></a></p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../Method.html"><code>Method</code></a></p>
<ul><li>
<p>new method:</p>
<ul><li>
<p><a href="../Method.html#method-i-parameters"><code>Method#parameters</code></a></p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../NilClass.html"><code>NilClass</code></a></p>
<ul><li>
<p>new method:</p>
<ul><li>
<p><a href="../NilClass.html#method-i-rationalize"><code>NilClass#rationalize</code></a></p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../Object.html"><code>Object</code></a></p>
<ul><li>
<p>extended methods:</p>
<ul><li>
<p>Float() supports hexadecimal floating point format.</p>
</li><li>
<p>printf() supports %a/%A format.</p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../Proc.html"><code>Proc</code></a></p>
<ul><li>
<p>new method:</p>
<ul><li>
<p><a href="../Proc.html#method-i-parameters"><code>Proc#parameters</code></a></p>
</li></ul>
</li><li>
<p>extended method:</p>
<ul><li>
<p><a href="../Proc.html#method-i-source_location"><code>Proc#source_location</code></a> returns location even if receiver is a method defined by attr_reader / attr_writer / attr_accessor.</p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../Process.html"><code>Process</code></a></p>
<ul><li>
<p>extended method:</p>
<ul><li>
<p><a href="../Process.html#method-c-spawn"><code>Process.spawn</code></a> accepts [:child, FD] for a redirect target.</p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../Random.html"><code>Random</code></a> (new class to generate pseudo-random numbers)</p>
</li><li>
<p><a href="../Rational.html"><code>Rational</code></a></p>
<ul><li>
<p>new method:</p>
<ul><li>
<p><a href="../Rational.html#method-i-rationalize"><code>Rational#rationalize</code></a></p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../String.html"><code>String</code></a></p>
<ul><li>
<p>extended methods:</p>
<ul><li>
<p>string[regexp, name] is supported for named capture.</p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../Thread.html"><code>Thread</code></a></p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p><a href="../Thread.html#method-i-add_trace_func"><code>Thread#add_trace_func</code></a></p>
</li><li>
<p><a href="../Thread.html#method-i-set_trace_func"><code>Thread#set_trace_func</code></a></p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../Time.html"><code>Time</code></a></p>
<ul><li>
<p>extended features:</p>
<ul><li>
<p>time_t restriction is removed to represent before 1901 and after 2038. Proleptic Gregorian calendar is used for old dates.</p>
</li><li>
<p><a href="../Time.html#method-c-new"><code>Time.new</code></a> have optional arguments to specify date with time offset.</p>
</li><li>
<p><a href="../Time.html#method-i-getlocal"><code>Time#getlocal</code></a>, <a href="../Time.html#method-i-localtime"><code>Time#localtime</code></a> have optional time offset argument.</p>
</li></ul>
</li><li>
<p>new methods:</p>
<ul><li>
<p><a href="../Time.html#method-i-to_r"><code>Time#to_r</code></a></p>
</li><li>
<p><a href="../Time.html#method-i-subsec"><code>Time#subsec</code></a></p>
</li><li>
<p><a href="../Time.html#method-i-round"><code>Time#round</code></a></p>
</li></ul>
</li><li>
<p>incompatible change:</p>
<ul><li>
<p>The year argument of <a href="../Time.html"><code>Time</code></a>.{utc,gm,local,mktime} is now interpreted as the value itself.  For example, <a href="../Time.html#method-c-utc"><code>Time.utc(99)</code></a> means the year 99 AD, not 1999 AD.</p>
</li></ul>
</li></ul>
</li><li>
<p><a href="../UnboundMethod.html"><code>UnboundMethod</code></a></p>
<ul><li>
<p>new method:</p>
<ul><li>
<p><a href="../UnboundMethod.html#method-i-parameters"><code>UnboundMethod#parameters</code></a></p>
</li></ul>
</li></ul>
</li></ul>
</li><li>
<p>digest</p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p>Digest::Class.base64digest</p>
</li><li>
<p>Digest::Instance#base64digest</p>
</li><li>
<p>Digest::Instance#base64digest!</p>
</li></ul>
</li><li>
<p>Digest::HMAC (digest/hmac) has been marked as deprecated because it was unintentional for the experimental library to be included in the final release of 1.9.1.  Please use OpenSSL::HMAC instead.</p>
</li></ul>
</li><li>
<p>rss</p>
<ul><li>
<p>0.2.4 -&gt; 0.2.7.</p>
</li><li>
<p>RSS::Maker.make</p>
<ul><li>
<p>raise an exception not returns nil for invalid feed making.</p>
</li><li>
<p>requires block.</p>
</li></ul>
</li><li>
<p>RSS::Maker.[]</p>
<ul><li>
<p>new method to return maker class.</p>
</li></ul>
</li><li>
<p>RSS::Maker.supported?(version)</p>
<ul><li>
<p>new method to check whether given version is supported.</p>
</li></ul>
</li><li>
<p>RSS::Maker: item.guid.permanent_link?</p>
<ul><li>
<p>new alias of item.guid.isPermaLink</p>
</li></ul>
</li><li>
<p>RSS::Maker: item.guid.permanent_link=</p>
<ul><li>
<p>new alias of item.guid.isPermaLink=</p>
</li></ul>
</li></ul>
</li><li>
<p>DL</p>
<ul><li>
<p>Now uses libffi as a backend if available. It means DL works fine on more platforms.</p>
</li></ul>
</li><li>
<p>Fiddle</p>
<ul><li>
<p>A lightweight wrapper for libffi.</p>
</li></ul>
</li><li>
<p>YAML</p>
<ul><li>
<p>Now uses libyaml as a backend if available. It means YAML library supports new standards for YAML.</p>
</li></ul>
</li><li>
<p>Psych</p>
<ul><li>
<p>A wrapper for libyaml.</p>
</li></ul>
</li><li>
<p>JSON</p>
<ul><li>
<p>Update to JSON 1.1.9</p>
</li></ul>
</li><li>
<p>REXML</p>
<ul><li>
<p>REXML::Document.entity_expansion_limit=</p>

<p>New method to set the entity expansion limit. By default the limit is set to 10000.  See the following URL for details.</p>

<p><a href="https://www.ruby-lang.org/en/news/2008/08/23/dos-vulnerability-in-rexml">www.ruby-lang.org/en/news/2008/08/23/dos-vulnerability-in-rexml</a>/</p>
</li></ul>
</li><li>
<p><a href="../RDoc.html"><code>RDoc</code></a></p>
<ul><li>
<p>Updated to <a href="../RDoc.html"><code>RDoc</code></a> 2.5.8</p>
</li></ul>
</li><li>
<p>RubyGems</p>
<ul><li>
<p>Updated to RubyGems 1.3.7</p>
</li></ul>
</li><li>
<p>logger</p>
<ul><li>
<p>imported upstream version (logger/1.2.7)</p>
<ul><li>
<p>do not raise an exception even if log writing failed.</p>
</li><li>
<p>do not raise ShiftingError if an aged file already exists. (no ShiftingError will be raised from 1.2.7, just warn() instead)</p>
</li></ul>
</li></ul>
</li><li>
<p>matrix</p>
<ul><li>
<p>API change to adhere strictly to mathematical definitions:</p>
<ul><li>
<p>Matrices must now be rectangular.</p>
</li><li>
<p>trace, regular?, singular? are defined only for square matrices</p>
</li><li>
<p>support for empty matrices</p>
</li><li>
<p>all integer matrices now have the right determinant (also an integer)</p>
</li></ul>
</li><li>
<p>Matrix and Vector include <a href="../Enumerable.html"><code>Enumerable</code></a>.</p>
</li><li>
<p>new methods:</p>
<ul><li>
<p>Matrix.build</p>
</li><li>
<p>Matrix.empty</p>
</li><li>
<p>Matrix#conj</p>
</li><li>
<p>Matrix#conjugate</p>
</li><li>
<p>Matrix#each</p>
</li><li>
<p>Matrix#each_with_index</p>
</li><li>
<p>Matrix#empty?</p>
</li><li>
<p>Matrix#imag</p>
</li><li>
<p>Matrix#imaginary</p>
</li><li>
<p>Matrix#real</p>
</li><li>
<p>Matrix#real?</p>
</li><li>
<p>Matrix#rect</p>
</li><li>
<p>Matrix#rectangular</p>
</li></ul>
</li></ul>
</li><li>
<p>net/http</p>
<ul><li>
<p>merged net/https.</p>
</li></ul>
</li><li>
<p>open3</p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p>Open3.popen2</p>
</li><li>
<p>Open3.popen2e</p>
</li><li>
<p>Open3.capture3</p>
</li><li>
<p>Open3.capture2</p>
</li><li>
<p>Open3.capture2e</p>
</li><li>
<p>Open3.pipeline_rw</p>
</li><li>
<p>Open3.pipeline_r</p>
</li><li>
<p>Open3.pipeline_w</p>
</li><li>
<p>Open3.pipeline_start</p>
</li><li>
<p>Open3.pipeline</p>
</li></ul>
</li></ul>
</li><li>
<p>pty</p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p>PTY.open</p>
</li><li>
<p>PTY.check</p>
</li></ul>
</li><li>
<p>deprecated methods:</p>
<ul><li>
<p>protect_signal</p>
</li><li>
<p>reset_signal</p>
</li></ul>
</li></ul>
</li><li>
<p>openssl</p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p>OpenSSL::Buffering#read_nonblock</p>
</li><li>
<p>OpenSSL::Buffering#write_nonblock</p>
</li><li>
<p>OpenSSL::SSL::SSLSocket#connect_nonblock</p>
</li><li>
<p>OpenSSL::SSL::SSLSocket#accept_nonblock</p>
</li></ul>
</li></ul>
</li><li>
<p>scanf</p>
<ul><li>
<p>support %a/%A format.</p>
</li></ul>
</li><li>
<p>socket</p>
<ul><li>
<p>incompatible changes:</p>
<ul><li>
<p>Socket#{recvfrom,recvfrom_nonblock,accept,accept_nonblock,sysaccept} returns a sender address as Addrinfo object instead of a binary sockaddr string. Addrinfo#to_s returns the old binary sockaddr string.</p>
</li><li>
<p>BasicSocket#getsockopt returns Socket::Option object instead of a binary string. Socket::Option#to_s returns the old binary string.</p>
</li><li>
<p>Socket.do_not_reverse_lookup is turned on by default now.</p>
</li></ul>
</li><li>
<p>new class:</p>
<ul><li>
<p>Addrinfo</p>
</li><li>
<p>Socket::Option</p>
</li><li>
<p>Socket::AncillaryData</p>
</li></ul>
</li><li>
<p>new methods:</p>
<ul><li>
<p>Socket.ip_address_list</p>
</li><li>
<p>Socket.tcp</p>
</li><li>
<p>Socket.tcp_server_loop</p>
</li><li>
<p>Socket.tcp_server_sockets</p>
</li><li>
<p>Socket.udp_server_sockets</p>
</li><li>
<p>Socket.udp_server_loop_on</p>
</li><li>
<p>Socket.udp_server_loop</p>
</li><li>
<p>Socket.unix</p>
</li><li>
<p>Socket.unix_server_loop</p>
</li><li>
<p>Socket.unix_server_socket</p>
</li><li>
<p>Socket.accept_loop</p>
</li><li>
<p>Socket#ipv6only!</p>
</li><li>
<p>BasicSocket#local_address</p>
</li><li>
<p>BasicSocket#remote_address</p>
</li><li>
<p>BasicSocket#connect_address</p>
</li><li>
<p>BasicSocket#sendmsg</p>
</li><li>
<p>BasicSocket#sendmsg_nonblock</p>
</li><li>
<p>BasicSocket#recvmsg</p>
</li><li>
<p>BasicSocket#recvmsg_nonblock</p>
</li><li>
<p>BasicSocket#getpeereid</p>
</li></ul>
</li><li>
<p>extended methods:</p>
<ul><li>
<p>Socket.new’s 3rd argument is optional now.</p>
</li><li>
<p>Socket.pair’s 3rd argument is optional now.</p>
</li><li>
<p>Socket.pair and UNIXSocket.pair can take a block.</p>
</li><li>
<p>BasicSocket#send, UDPSocket#send, Socket.getnameinfo, Socket#bind, and Socket#{connect,connect_nonblock} accepts an Addrinfo object as sockaddr.</p>
</li><li>
<p>BasicSocket#getsockopt accepts a Socket::Option object.</p>
</li><li>
<p>Socket.getaddrinfo and IPSocket#{addr,peeraddr} accept an optional argument to turn reverse lookup on/off.</p>
</li><li>
<p>constant names can be accepted as well as constant values. i.e. Socket.new(:PF_INET, :SOCK_STREAM, 0) The constant names can be specified without the prefix. i.e. Socket.new(:INET, :STREAM, 0)</p>
<ul><li>
<p>protocol/address family</p>
</li><li>
<p>socket type</p>
</li><li>
<p>socket option protocol level</p>
</li><li>
<p>socket option name</p>
</li><li>
<p>shutdown’s argument</p>
</li></ul>
</li></ul>
</li></ul>
</li><li>
<p>stringio</p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p>StringIO#read_nonblock</p>
</li><li>
<p>StringIO#write_nonblock</p>
</li></ul>
</li></ul>
</li><li>
<p>pathname</p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p>Pathname#binread</p>
</li><li>
<p>Pathname#realdirpath</p>
</li><li>
<p>Pathname#each_child</p>
</li></ul>
</li><li>
<p>extended methods:</p>
<ul><li>
<p>Pathname#realpath and Pathname#realdirpath takes optional basedir argument.</p>
</li></ul>
</li></ul>
</li><li>
<p>Readline</p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p>Readline.set_screen_size</p>
</li><li>
<p>Readline.get_screen_size</p>
</li></ul>
</li><li>
<p>extended methods:</p>
<ul><li>
<p>Readline.completion_proc= accepts nil. nil means to use default completion proc.</p>
</li></ul>
</li></ul>
</li><li>
<p>set</p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p>Set#keep_if</p>
</li><li>
<p>Set#select!</p>
</li></ul>
</li></ul>
</li><li>
<p>time</p>
<ul><li>
<p>incompatible changes:</p>
<ul><li>
<p>Time.parse raises <a href="../ArgumentError.html"><code>ArgumentError</code></a> when no date information.</p>
</li></ul>
</li></ul>
</li><li>
<p>thread</p>
<ul><li>
<p>extended method:</p>
<ul><li>
<p>ConditionVariable#wait takes timeout argument.</p>
</li></ul>
</li></ul>
</li><li>
<p>securerandom</p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p>SecureRandom.urlsafe_base64</p>
</li></ul>
</li></ul>
</li><li>
<p>URI</p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p>URI.encode_www_form</p>
</li><li>
<p>URI.decode_www_form</p>
</li><li>
<p>URI.encode_www_form_component</p>
</li><li>
<p>URI.decode_www_form_component</p>
</li></ul>
</li><li>
<p>Obsoleted methods:</p>
<ul><li>
<p>URI.decode</p>
</li><li>
<p>URI.encode</p>
</li><li>
<p>URI.escape</p>
</li><li>
<p>URI.unescape</p>
</li></ul>
</li></ul>
</li><li>
<p>etc</p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p>Etc::Passwd.each</p>
</li><li>
<p>Etc::Group.each</p>
</li></ul>
</li></ul>
</li><li>
<p>zlib</p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p>Zlib::GzipFile#path</p>
</li><li>
<p>Zlib.#adler32_combine</p>
</li><li>
<p>Zlib.#crc32_combine</p>
</li></ul>
</li></ul>
</li><li>
<p>rbconfig</p>
<ul><li>
<p>new methods:</p>
<ul><li>
<p>RbConfig.ruby</p>
</li></ul>
</li></ul>
</li></ul>

<h3 id="label-Language+changes">Language changes<span><a href="#label-Language+changes">&para;</a> <a href="#top">&uarr;</a></span></h3>
<ul><li>
<p><a href="../Regexp.html"><code>Regexp</code></a> properties (p{}) names now ignore underscores, spaces, and case, so p{ol chiki} is the same as p{Ol_Chiki}</p>
</li><li>
<p>Regexps now support Unicode 5.2 (new characters and scripts)</p>
</li><li>
<p>d, s, and w are now ASCII only; use POSIX bracket classes and p{} for Unicode semantics</p>
</li><li>
<p>$: no longer includes the current directory, use require_relative</p>
</li><li>
<p><a href="../Symbol.html"><code>Symbol</code></a> with an invalid encoding is forbidden to exist.</p>
</li></ul>

<h3 id="label-Compilation+options">Compilation options<span><a href="#label-Compilation+options">&para;</a> <a href="#top">&uarr;</a></span></h3>
<ul><li>
<p>–program-prefix and –program-suffix no longer act on the shared object names nor paths to libraries.</p>

<p>use –with-rubylibprefix=‘${libruby}/${RUBY_INSTALL_NAME}’ and –with-soname=‘${RUBY_INSTALL_NAME}’ for the same result as Ruby 1.9.1.</p>
</li><li>
<p>–with-arch is added for universal binary, instead of –enable-fat-binary option.</p>
</li></ul>

<h3 id="label-Compatibility+issues+-28excluding+feature+bug+fixes-29">Compatibility issues (excluding feature bug fixes)<span><a href="#label-Compatibility+issues+-28excluding+feature+bug+fixes-29">&para;</a> <a href="#top">&uarr;</a></span></h3>

<pre>* Enumerator#rewind
* Socket#recvfrom
* Socket#recvfrom_nonblock
* Socket#accept
* Socket#accept_nonblock
* Socket#sysaccept
* BasicSocket#getsockopt
* Time.utc
* Time.gm
* Time.local
* Time.mktime
* Time.parse
* --program-prefix and --program-suffix
* --enable-fat-binary
* $:

  See above.

* Digest::HMAC

  Deprecated.  See above.</pre>

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